Alveoli and Gaseous Exchange

Question 1

What is the structure of the alveoli?

4 things

Answer 1

• Small/tiny air sacs
• Thin walls
• Moist
• Surrounded by capillaries

Question 2

How do gases move and what is the name for this movement?

Answer 2

Diffusion - Areas of a HIGH concentration to areas of a LOW concentration.

Question 3

Where are the alveoli?

Answer 3

Attached to the branches of the bronchioles throughout the lungs.

Question 4

What takes place at the alveoli?

Answer 4

The exchange of oxygen and carbon dioxide.

Question 5

What do capillaries gain from the alveoli and what do the do with it?

Answer 5

Gain oxygen and transport it around the body.

Question 6

Where does gas exchange take place?

Answer 6

Between the alveoli and the capillaries and between the capillaries and the muscle tissue.

Question 7

In gas exchange what moves from the alveoli to capillaries?

Answer 7

Oxygen

Question 8

In gas exchange what moves from the capillaries to the alveoli?

Answer 8

Carbon dioxide

Question 9

Capillaries surrounding alveoli (from muscles) have a high pressure and concentration of what?

Answer 9

Carbon dioxide

Question 10

Capillaries surrounding alveoli (from muscles) have a low pressure and concentration of what?

Answer 10

Oxygen

Question 11

What is moved out of the blood and into the alveoli to be breathed out?

Answer 11

Carbon dioxide